The SS Iserlohn was a cargo vessel constructed in 1909 by Reiherstieg Schiffswerfte & Maschinenfabrik in Hamburg, Germany, with yard number 426. She measured approximately 121.61 meters (399 feet) in length, with a beam of 16.37 meters (53 feet 8 inches) and a depth of 7.55 meters (24 feet 9 inches). Her gross register tonnage was 4,667 GRT, and her net register tonnage was 2,760 NRT, with a deadweight tonnage of 7,669 tons. Propelled by a triple expansion steam engine built by the same Hamburg-based shipyard, the vessel's engine featured cylinders of 66, 121, and 195 centimeters in diameter, with a 122-centimeter stroke, providing the power needed for her voyages. Initially owned by Deutsche-Australische Dampfschiffs Gesellschaft of Hamburg, Iserlohn was launched on 14 August 1909 and registered in Hamburg. Her service history includes a period in 1914 when she was interned at Batavia, in the Dutch East Indies. Post-World War I, in 1919, she was ceded to the United Kingdom and managed by the British-India Steam Navigation Co Ltd under the British Shipping Controller, carrying the Official Number 143916. Throughout her merchant career, she was sold multiple times, being renamed Union City in 1921 under William Reardon Smith & Sons, then Wasaborg in 1924 when acquired by Finnish interests, and later Erica in 1935 after her sale to Italy. In 1940, during World War II, she was seized by the UK and renamed Empire Defiance, serving under the Ministry of War Transport. Her wartime service involved extensive convoy participation across various routes, including Freetown, Cape Town, and Calcutta, carrying general cargo, mail, and supplies. In June 1944, Empire Defiance was scuttled at Sword, Ouistreham, France, as part of the Allied efforts in Operation Overlord. Salvaged in 1951, she was towed to Belgium for scrapping, after an incident in August 1951 when she was beached off Zeebrugge due to a leak. Her long service life and involvement in wartime operations mark her as a vessel of notable maritime significance.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.